import java.util.*;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ling
 * Date: 2022-07-03
 * Time: 8:55
 */
public class Test2 {
    public static void main(String[] args) {
        IntCmp intCmp=new IntCmp();

        PriorityQueue<Integer> qu=new PriorityQueue<>(intCmp);

        String key="a b c";
        char ch='a';
        if(ch=='a'){

        }
        Map<Character,Character> map=new HashMap<>();
      ch='a'+1;
      map.put('a',ch);
        System.out.println(map.get('a'));
        StringBuilder stringBuilder=new StringBuilder();
        stringBuilder.append(' ');
        int count=0;
        int s='a'+count;
        char t=(char)s;
        System.out.println(t);
        int[][] matrix=new int[3][2];
        PriorityQueue<int[]> min=new PriorityQueue<>(new Comparator<int[]>() {
            @Override
            public int compare(int[] o1, int[] o2) {
                return o1[1]-o2[1];
            }
        });
        int[][] tm={{1,2,3},{3,4,5}};
        int[] tmp=tm[0];
        tm[0]=tmp;
        System.out.println(Arrays.toString(tmp));
        System.out.println(-1*-1);
//        String s="abc";
//        s.trim();
        StringBuilder str=new StringBuilder();
        List<Integer> list=new ArrayList<>();
        Stack<Integer> anb=new Stack<>();

        List<Integer> ret=new ArrayList<>(qu);
    }

}
class IntCmp implements Comparator<Integer>{

    @Override
    public int compare(Integer o1, Integer o2) {
        return o2-o1;
    }
}
